A spindle motor is provided. The spindle motor includes a base, a bearing housing, a bearing, a rotation shaft, a stator, and a rotor. The bearing housing is installed on the base. The bearing is press-fitted in the bearing housing, and includes a suction magnet installed therein. The rotation shaft is rotatably supported by the bearing, and is drawn by the suction magnet. The stator is supported by the base. The rotor is coupled to the rotation shaft to be rotated through interaction with the stator.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A spindle motor comprising: a base; a bearing housing installed on the base; a bearing installed in the bearing housing, and comprising a suction magnet installed in a biased position of the bearing; a rotation shaft rotatably supported by the bearing, and drawn by the suction magnet; a stator supported by the base; and a rotor coupled to the rotation shaft to be rotated through interaction with the stator, wherein the bearing housing comprises a protruding portion projecting radially outward from an upper portion of the bearing housing, and the rotor comprises a stopper installed on a lower surface thereof, the stopper having a portion vertically overlapping the protruding portion.
2. The spindle motor according to claim 1 , wherein the suction magnet has at least a portion inserted in the bearing.
3. The spindle motor according to claim 1 , wherein the suction magnet is installed on an upper portion of the bearing.
4. The spindle motor according to claim 1 , wherein the suction magnet is installed on a lower portion of the bearing.
5. The spindle motor according to claim 1 , wherein, when the bearing is viewed from a side, the suction magnet is installed in a position biased upward or downward from a vertical center of the bearing.
6. A spindle motor comprising: a base; a bearing housing installed on the base; a bearing installed in the bearing housing, and comprising a first suction magnet installed in a biased position of an upper portion of the bearing and a second suction magnet installed in a biased position of a lower portion of the bearing; a rotation shaft rotatably supported by the bearing, and drawn by the first suction magnet and the second suction magnet; a stator supported by the base; and a rotor coupled to the rotation shaft to be rotated through interaction with the stator.
7. The spindle motor according to claim 6 , wherein the first suction magnet or the second suction magnet has at least a portion inserted in the bearing.
8. The spindle motor according to claim 6 , wherein when the bearing is viewed from above, the first suction magnet and the second suction magnet are disposed facing one another about a horizontal center of the bearing.
9. The spindle motor according to claim 6 , wherein the first suction magnet draws the rotation shaft in a first direction from the upper portion, and the second suction magnet draws the rotation shaft in a second direction that is opposite the first direction from the lower portion.
10. The spindle motor according to claim 6 , wherein the bearing housing comprises a protruding portion projecting radially outward from an upper portion of the bearing housing, and the rotor comprises a stopper installed on a lower surface thereof, the stopper having a portion vertically overlapping the protruding portion.
11. The spindle motor according to claim 6 , further comprising a third suction magnet installed on the bearing housing or the stator to draw the rotor.
12. The spindle motor according to claim 6 , wherein the rotor comprises a clamp coupled thereto to elastically support a disk that is mounted.
13. A bearing for a spindle motor to rotatably support a rotation shaft, the bearing comprising a suction magnet installed thereon to attract the rotation shaft.
14. The bearing according to claim 13 , wherein the suction magnet has at least one portion thereof inserted and installed in the bearing.
15. The bearing according to claim 14 , wherein the suction magnet is installed to be biased to one side from a center of the bearing.
16. The bearing according to claim 15 , wherein the suction magnet is installed on at least one of an upper portion and a lower portion of the bearing.
17. The bearing according to claim 15 , wherein the suction magnet comprises a first suction magnet and a second suction magnet installed on two portions of the bearing, respectively.
18. The bearing according to claim 17 , wherein the first suction magnet draws the rotation shaft in a first direction, and the second suction magnet draws the rotation shaft in a second direction opposite the first direction.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
September 18, 2008
December 27, 2011
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